Marixts methiltus sorensen



May 22, 1923. 1,456,287

M. M. s6RENsEN METHOD FOR PULLIN OVER UPPERS File d May 28 1919 INVENTOR ATTORNEY Patented May 22, 1923.

UNITED STATES PATENT OFFICE.

METHOD FOR PULLING OVER UPPERS.

Application filed May 28, 1919. Serial No. 300,244.

Uppers, of which the following is a specification.-

This invention relates to a method of pulling over shoe uppers on the last, especially uppers which are to be lasted according to the method covered by Patent No. 1,224,229.

The object of the invention is to hold the upper fast in the stretched position without the use of nails, which would complicate the ensuing lasting according to the aforesaid method, and which requires the dis- 20 posal of a special nail feeding mechanism and nail-driving mechanism in connection with the pulling over mechanism.

With the present method, after the upper is pulled over the last through the move- 25 ment of the pulling-grippers, a pressure on the upper, directed against the top side of the last, is exercised and maintained, so that there occurs a sufliciently strong friction between the last and the upper to hold the latter in the pulled over position.

The invention is illustrated in the accompanying drawing, in which Fig. 1 diagrammatically shows the aforesaid princi le, and Fig. 2 shows a device intended to exercise and maintain the aforesaid pressure.

For the sake of simplicity the edge of the upper is shown by means of a double line, in such a manner that one line indicates the threads 5 and 6 respectively, which serves for lasting the front 3 and the back 4, respectively. 7 designates the last, and 8 represents the grippers of the pulling over mechanism.

When the upper, in the well-known way, has been grasped by the grippers and is pulled down over the 1ast through the movements of these grippers, the aforesaid friction between the last and the upper is effected by pressure, as indicated by the arrows 9 and 10 in Fig. 1, and as this pressure is maintained, independent of the pulling over machine, the last, with the upper pulled over it, can be removed from this machine, and can be manipulated just like the intermediate product that comes from the ordinary pulling over machines which operate with nails.

The device, independent of the pulling over machine, for producing and maintaining the aforesaid friction between the last and the upper consists, in the example shown in Fig. 2, of a strap 11, which is passed over the upper, and which can be maintained in stretched condition by means of a spring 12. This spring is of the traction spiral type and is disposed on a rod; 13, with whose head 14: one of its ends is connected, while its other end is connected with a sleeve 15 shiftable on the rod. Close to the other end of the rod there is a holdingmember 16, which, when the spring is pulled by the sleeve 15 approaching this end, can grip into an undercut recess 17 in the sleeve, and thus keep the spring in tension. At this end of the rod 13 there is a pressureplate 18 which can press against the bottom of the last 7, and on the sleeve 15 there are hooks 19 on which the ends of the strap 11 can be hooked in an easily releasable manner. When the holding-member 16 is released from the recess 17 the spring 12, as it contracts, will pull the strap 11 tight over the upper, thus producing the desired friction-connection between last and upper.

It is .obvious that the invention is not confined to the use of holding devices of the kind shown in Fig. 2, but that other types of holding devices can be used, and it is also self-evident that the details of the device, as here set forth by way of example, are immaterial and unessential and can be modified in many ways.

I claim A method for pulling over foot-gear on the last consisting in placing the upper leather over the last, stretching a strap across the outer surface of the upper and pu1ling the ends of said strap in a direction away from the bottom of the upper to exercise a pressure on the upper between its stretched edges, said pressure acting in a direction ar ainst the upper side of the last, thus producing a friction between the upper and the last, maintaining this friction, and subsequently releasing the strap from the upper.

In testimony whereof I aflix my signature in the presence of two Witnesses.

MARIUS METHILTUS SGRENSEN. Witnesses:

N. BUsoH-JENsEN, E. W. ELLSKOW. 

